clock_access_fn    12 arch/arm/include/asm/mach/time.h typedef void (*clock_access_fn)(struct timespec64 *);
clock_access_fn    13 arch/arm/include/asm/mach/time.h extern int register_persistent_clock(clock_access_fn read_persistent);
clock_access_fn    82 arch/arm/kernel/time.c static clock_access_fn __read_persistent_clock = dummy_clock_access;
clock_access_fn    89 arch/arm/kernel/time.c int __init register_persistent_clock(clock_access_fn read_persistent)